Effect of water vapor from power station flue gas on CO2 capture by vacuum swing adsorption with activated carbon

Dong Xu, Jun Zhang, Gang Li, Penny Xiao, Paul Webley, Yu Chun Zhai

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24 Citations (Scopus)

Abstract

Due to the high absolute humidity of real flue gas, activated carbon, a hydrophobic adsorbent, was used to selectively adsorb CO2 by vacuum swing adsorption in this study. The objective of this work is to study the feasibility and advantage of CO2 capture along with simultaneous moisture removal by activated carbon and the effect of H2O on CO2 capture from wet flue gas streams. Through experiment and analysis, the "S" shape isotherms of water indicated water was easier to be desorbed from activated carbon. Then a cone shape model was proposed to depict water distribution inside the adsorption bed. As a consequence, water vapor hardly influenced the CO2 capture performance. Moreover, the process can be operated under a relatively high vacuum pressure and short evacuation time. The preliminary results showed that our one-bed VSA process could yield a good CO2 recovery of over 80% and a reasonable purity of 43%.

Original languageEnglish
Pages (from-to)169-174
Number of pages6
JournalRanliao Huaxue Xuebao/Journal of Fuel Chemistry and Technology
Volume39
Issue number3
DOIs
Publication statusPublished - Mar 2011

Keywords

  • Activated carbon
  • Carbon dioxide
  • Flue gas
  • Vacuum swing adsorption
  • Water vapor

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